Literal question
Under Supervisor’s observation perform blank tests for E. coli
Using a sample of sterile water given by the supervisor, take a sterile 1 mL syringe and add 1 mL of water to each of the two compact dry plates. Filter 100 mL of water through a sterile filter paper and place this in one of the Compact Dry plates. Close and label both S-XXX-YY, where XXX is the cluster number and YY is the household number.
Question post text
Check if the household is selected for Blank Sampling:
Yes Continue with WQ14A.
No Thank the respondent. The interview is complete.